Temperature-regulator for furnaces.



H. E. GILBERT.

TEMPERATURE REGULATOR FOR FURNACES.

APPLICATION FILED use. 9, 1914.

1 177,859. Patented Apr. 4, 1916.

2 SHEETS-SHEET I.

INVENTOR WITNESSES \B YVM? ATTORNEY H. E. GILBERT.

TEMPERATURE REGULATOR FOR FURNACES.

APPLICATION man Dec. 9 2w 1,177,859. 1mm Apr. 4,1910.

2 SHEETS SHEET 2- INVENTOR TEMPERATURE-REGULATOR FOR FURNACES.

Specification of Letters Patent.

Patented Apr. 4, 1916.

Application filed December 9, 1914. Serial No. 876,260.

T 0 all whom it may concern:

Be it known that I, HARRY E. GILBERT, a citizen of the United States, and resident of Conshohocken, county of Montgomery, and State of Pennsylvania, have invented an Improvement i for Furnaces, of which the following is a specification.

This invention relates to a control mechanism for thermostats when employed for regulating the fuel to furnaces, and consists of certain improvements which are fully set forth in the following specification and shown in the accompanying drawings which form a part thereof.

The object of the invention is to provide a controlling device for thermostatic elements, whereby the supplies of fuel and air may be automatically regulated and the temperature of a furnace may he maintained constant under all ordinary conditions according to requirements.

It has for a further object to provide an adjusting mechanism for the automatic control devices for the furnace whereby the normal desired temperature within the furnace may be insured and maintained.

My invention consists of mechanism for effectually carrying into operation the above recited objects, said mechanism being hereinafter described and more particularly dc fined in the claims.

Referring to the drawings: Figure 1 represents a side elevation of an apparatus embodying my invention shown in operative position upon a suitable furnace; Fig. 2 represents a front elevation of the same, Fig. 3 represents a more detailed side elevation of the control valve; and Fig. 4 represents a section on line 4-4 of Fig. 2.

1 designates the casing of a suitable fornace which receives the oil or gas for fuel under pressure by way of the nozzle 2 and supply pipe 3. l

4 designates the air supply pipe for ad mitting air with the fuel to the furnace so that the proper conibustive mixture is obtained. The fuel supply pipe 3 and the air pipe *t are respectively c :ntrolled by thermostatically controlled'valves 5' and 5, and in view of the fact that the regulating means for these two mediums is identical in con struction, the description will be confined to Temperature-Regulators one of the thermostatic controlled devices, and the same reference numerals will apply to the details of the other.

In the particular illustration of my invention, I have shown the fuel supply pipe 3 as intended for oil, but in referring to the fuel as oil it is to be understood that I include gas as an equivalent of the oil.

6 designates an upright tubular casing mounted upon the furnace casing '1 and having communication with the combustion chamber of the furnace through any suitable port 7. The casing (S surrounds the thermostatic element 8 which by its expansion and contraction operates and close the valve 5 for regulating purposes, as will be understood. The operating connections between this thermostatic elerrnn STATES PATENT OFFICE.

to automatically open 5 ment and the valve 5 are indicated only diagrannnatically since they form no part of the present invention, and any type of trans mitting means may be employed.

9 designates a closure for the outer end of the casing G, the same being provided with suitable outlets 10 for the heated products which are by-passed from the furnace through the casing G.

11 designates openings through the casing (i, said openings arranged diametrically opposite and preferably located adjacent to or near the point where the heated gases are admitted and slightly removed from the vicinity of the lower end of the thermostatic member 8.

l2 designates slide valve members for respectively controlling the openings 11, the said valve members being, as here shown, fixed respectively to bars 13 which guided in the walls of the casing t3 and terminate respectively in racks 14' which are in mesh with the operating pinions 15 upon the shaft 16, which is rotatably mounted in a frame extension 17 fixed to the casing (i and provided with the. hand wheel 21. The rotation of the shaft 16 and pinions 15 causes the bars 13 to be moved in one direction or the other and thus vary the position of the valve members 12 with respect to the openings 11. i

18 designates an indicating mechanism suitably geared at 19 to the shaftlti, as

shown, and adapted to be operated to indicate the extent of the movement given to it is possible to obtain a very accurate furnace temperature, and automatically maintain such temperature.

I have shown my improved apparatus in the form which I have found excellently adapted for the purpose but I do not restrict myself to the details as these may he modilied in various ways without departing from the spirit of the invention; for example, while the casing \3 is provided with the valves 12 at the lower portions thereof I do not restrict myself to this particular arrangement as any suitable arrangement may be provided wherein the said casing is furnished with outlets to the atmosphere and valve devices arranged to regulate the amount of the hot gases which circulate over the thermostatic elements.

llaving now described my invent onnvhat l claim as new and desire to protect by Lettcrs Patent is:-

l. in a device of the character stated, a furnace combined with a plurality of casings ach having communication with heated products of the furnace to provide for a 'il'lllllitlOll of a portion of the heated products through said casings. a fuel supply pipe leading to said birnace. a valve in said fuel supply pipe, :1 thermostatic element in one of said casings for controlling the operation of said who. an air supply pipe leading in said furnace. a alve in said air pipe. a thermostatic element in the other casing for controlling said air supplv valve, and means for peri'iitting hot products in regulated quantities to pass from each of said casings before reaching the thermostatic element for varying the temperature of the heated products passing through said casings, whereby a predetermiucd temperature is obtained in said furnace.

2. in a device of the character stated, a. furnace combined with a plurality of casings each having communication with a combustion chamber thereof to provide for a circulation of a portion of the heated prodlcls through said casings. and each of said casings being provided with an opening adia-. .Rl, the furnace end thereof, a fuel suppiy pipe leading to said furnace, a valve. in said fuel supply pipe. a thcrnmstatic element in one of said casings for controlling the operation of said valve. an air supply pipe leading to said furnace. a valve in said air pipe. :1 thermostatic element in the other casing for controlling said air supply valve, valves for respectively controlling said openings in the casings. and means for varying the positions of said valves with respect to said opening whereby the circulation and temperature of the heated products passing through said casings i varied at will.

Ll. in a device f the character stated. a furnace combined with a plurality of casings cacli having communication with the furnace to provide for a circulation of a portion of the heated products through said casings and each of said casings being provided with an opening adjacent the furnace end thereof, a fuel supply pipe leading to said furnace, a valve in said fuel supply pipe. a thermostatic element in one of said casings for controlling the operation of said valve, an air supply pipe leading to said furnace, a valve in said air pipe, a thermostatic element in the other casing for controlling said air supply 'alve. valves for respectively controlling said openings in the casings, means for varying the positions of said valves with respect to said openings, and means operating in conjunction with said valves for indicating the position of said valves with respect to said openings.

4. In a device of the character stated, a furnace combined with a plurality of casings each having communication with the furnace to provide for a circulation of a portion of the heated products through said casings each of said casings being provided with an opening adjacent the furnace end thereof, a fuel supply pipe leading to said furnace, a valve in said fuel supply pipe, a thermostatic element in one of said casings for controlling the operation of said valve, an air supply pipe leading to said furnace, a valve in said air pipe, a thermostatic element in the other casing for controlling'said air supply valve. valves for respectively controlling said openings in the casings, and manually controlled means common to both of said alvcs for varying the positions of said valves with respect to said openings.

In a device of the character stated, a furnace combined with a plurality of casings each having communication with the furnace to provide for a circulation of a portion of the heated products through said casings, a fuel supply pipe leading to said furnace. a valve in said fuel supply pipe, a thermostatic element in one of said casings for controlling the operation of said valve. an air supply pipe leading to said furnace, a valve in said air pipe. a thermostatic element in the other casing for controlling said air supplv valve, each of said casings being provided with openings adjacent the furnace end thereof, valves for respectively controlling said openings in the casings. a plurality of rack bars slidably mounted on said casings, valve members carried respectively by said rack bars and adapted to control the respective openings, and means for varying the positions of said rack bars whereby said valves may control the passage of the heated products through said openings to a greater or less extent.

6. in a device of the character stated, a furnace combined with a plurality of casings each having communication with heated products of the furnace to provide for a circulation of a portion of the heated products through said casings, a fuel supply pipe leading to said furnace. a valve in said fuel suppl pipe, a thermostatic element in one of said casings for controlling the operation of said valve an air supply ipe leading to said furnace. a valvein Sill. air pipe, a thermostatir element in the other rasinp for vontrollingr said air supply valve, and manually controlled means for varying the temperature of the products passing HARRY E. GILBERT. Witnesses:

C. H. \VISSMAXX, FLonn'x (n DEA cox. 

